Wax potting pickups: is it necessary?
Bubbles are released as the wax penetrates the coil and components of this humbucker.
Frequency response. Why is it important?
Unless you are interested in calculating the length of a coil or comparing it with another similar coil, forget about DC resistance.
The power of the Magnet
The pickup is the heart of the electric guitar and the magnet the heart of the pickup.
Magnet wire
Magnet wire is a tiny insulated copper conductor used to wind pickups. The insulation is usually some type of covering such as polyester, polyvinyl formal or a varnish, also called enamel.
Coil winder
The difference between hand wound pickups and machine wound ones is the method of getting copper wire onto the bobbin.